CN218731643U

CN218731643U - Battery module and battery pack

Info

Publication number: CN218731643U
Application number: CN202222848995.XU
Authority: CN
Inventors: 项罗毅; 纪任楷; 叶佳进; 黄绍雨; 黄维财
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-03-24
Anticipated expiration: 2032-10-27

Abstract

The application provides a battery module and battery package, this battery module includes: the battery pack comprises a shell, a battery arranged in the shell and a bus bar connected with the battery; the shell is provided with a shell body, and is characterized by also comprising a busbar and a conductive block arranged on the shell body; one end of the busbar is connected with the busbar; the other end of the busbar is a connecting end; the bus bar further comprises a limiting component which is detachably connected with the conductive block and aligns the connecting end of the bus bar with the conductive block. In above-mentioned technical scheme, the link that will arrange female row through the spacing subassembly that sets up aligns in advance with the conducting block to make things convenient for female arranging to be connected with the conducting block, avoid female arranging when with the busbar welding, lead to female arranging the position dislocation, can't be connected with the conducting block is electrically conducted, improved the yield of battery module assembly.

Description

Battery module and battery pack

Technical Field

The application relates to the technical field of batteries, in particular to a battery module and a battery pack.

Background

The battery module includes batteries and bus bars connected to the batteries so as to connect the batteries in series or in parallel. When the battery module is connected with an external circuit, the battery module needs to be connected with the bus bar through the busbar. And the busbar needs to be fixed on the shell of the battery module so as to ensure the stability of electric connection. However, when the busbar is welded to the busbar, the busbar is dislocated, so that the busbar cannot be fixed to the housing.

SUMMERY OF THE UTILITY MODEL

The application provides a battery module and a battery pack for improving the assembly effect of a busbar of the battery module.

In a first aspect, a battery module is provided, which includes: the battery pack comprises a shell, a battery arranged in the shell and a bus bar connected with the battery;

the shell is provided with a shell body, and is characterized by also comprising a busbar and a conductive block arranged on the shell body; one end of the busbar is connected with the busbar; the other end of the busbar is a connecting end;

the bus bar further comprises a limiting component which is detachably connected with the conductive block and aligns the connecting end of the bus bar with the conductive block.

In above-mentioned technical scheme, the link that will arrange female row through the spacing subassembly that sets up aligns in advance with the conducting block to make things convenient for female arranging to be connected with the conducting block, avoid female arranging when with the busbar welding, lead to female arranging the position dislocation, can't be connected with the conducting block is electrically conducted, improved the yield of battery module assembly.

In a second aspect, a battery pack is provided, which includes a case and any one of the above battery modules disposed in the case.

In the technical scheme, the connecting end of the busbar and the conducting block are pre-aligned through the arranged limiting assembly, so that the busbar is conveniently connected with the conducting block, the busbar is prevented from being welded with the busbar, the busbar is dislocated, the busbar cannot be conductively connected with the conducting block, and the yield of battery module assembly is improved.

Drawings

Fig. 1a is a schematic structural diagram of a battery module according to an embodiment of the present disclosure;

fig. 1b is an exploded view of a battery module according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a limiting assembly provided in the embodiment of the present application;

fig. 3 is an exploded view of a limiting assembly according to an embodiment of the present disclosure.

Detailed Description

The present application is described in further detail below with reference to the figures and examples. The features and advantages of the present application will become more apparent from the description.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

In addition, the technical features related to the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.

To facilitate understanding of the battery module provided in the embodiments of the present application, an application scenario of the battery module is first described. The battery module that this application embodiment provided is used for providing the electric energy. When in use, the bus bar is connected with an external circuit through the bus bar. However, when the bus bar is installed, the bus bar may be misaligned when the bus bar is welded to the bus bar, and thus the bus bar cannot be fixed. Therefore, the embodiment of the application provides a battery module for improving the assembly effect of a busbar. The following detailed description is given with reference to the accompanying drawings and examples.

Referring to fig. 1a and 1b, fig. 1a is a schematic structural diagram illustrating a battery module according to an embodiment of the present disclosure; fig. 1b is an exploded schematic view of a battery module according to an embodiment of the present disclosure. The structure of the battery module provided by the embodiment of the present application mainly includes a case 500 and a battery 600 disposed in the case 500. In addition, the battery module further includes a bus bar 300, and the bus bar 300 connects the batteries 600 to constitute a power source by connecting the batteries 600 in series or in parallel.

When the case 500 is specifically provided, the case 500 serves as a bearing structure having a cavity therein for accommodating the battery 600. The shape of the case 500 may be set as needed, and only the battery 600 may be carried. As an example, the housing 500 may have a regular housing 500 structure such as a rectangular parallelepiped or a square.

When the battery 600 is disposed, the battery 600 is fixed in the case 500. The number of the battery 600 may be plural, and the plural batteries 600 may be arranged in an array in the housing 500, or may be arranged in other different arrangements in the housing 500, which is not particularly limited in the embodiment of the present application. For example, when the battery 600 is fixed, the battery 600 may be adhesively fixed in the case 500 by an adhesive. Of course, besides the above-mentioned manner of adhesive, the battery 600 may be fixed in the housing 500 by other conventional fixing manners, which are not specifically limited in the embodiment of the present application.

When the bus bar 300 is electrically connected to the batteries 600, it is welded to the poles of the batteries 600, so that the different batteries 600 are connected in series or in parallel to constitute a power source. The specific arrangement of the bus bar 300 may be set according to the requirements of the battery modules when the battery modules constitute the power source, and is not particularly limited herein.

When the battery module outputs power, the bus bar 200 serves as an external connection member. When specifically setting up, female arranging 200 one end is the stiff end, and the other end is the link. Further, a conductive block 400 is provided on the case 500, and the conductive block 400 is configured to be engaged with the busbar 200. The following describes the arrangement of the bus bar 200 in detail.

In order to conveniently describe the structure of the battery module, an XYZ coordinate system is constructed. Wherein, the X direction is parallel to the length direction of the housing 500, the Y direction is parallel to the width direction of the housing 500, and the Z direction is parallel to the height direction of the housing 500.

As shown in fig. 1b, when the conductive block 400 is disposed, the conductive block 400 is disposed on a sidewall of the case 500. A height difference (a height difference in the Z direction) is formed between the side wall of the case 500 and the bus bar 300 of the battery 600, thereby forming a stepped structure. When the busbar 200 is arranged, the fixed end of the busbar 200 needs to be electrically connected with the busbar 300, and the connecting end of the busbar 200 needs to be electrically connected with the conductive block 400, so that the busbar 200 adopts a bending structure, the fixed end of the busbar 200 is in lap joint with the busbar 300 and is fixed, and the connecting end is in lap joint with the conductive block 400 and is fixed.

When the conductive block 400 is disposed, a hollow structure is disposed on the sidewall of the housing 500, and the conductive block 400 can be clamped in the hollow structure and partially exposed outside the sidewall of the housing 500. The exposed portion of the conductive block 400 is a portion engaged with the busbar 200.

When the busbar 200 is connected with the busbar 300, the busbar 200 is electrically connected with the busbar 300 in a welding manner, and meanwhile, the busbar 200 is fixedly connected with the busbar 300. When the busbar 200 is connected with the conductive block 400, the busbar 200 is fixedly connected with the conductive block 400 through a connecting piece, and the conductive connection between the busbar 200 and the conductive block 400 is realized. Illustratively, the connection end of the busbar 200 is laminated with the conductive block 400 in the Z direction. The connecting end of the busbar 200 is provided with a through hole, and the corresponding conductive block 400 is also provided with a threaded hole. When the connecting end of the busbar 200 is connected with the conductive block 400, the connecting piece can pass through the through hole on the connecting end of the busbar 200 and then be in threaded connection with the threaded hole on the conductive block 400, so that the fixed connection between the connecting end and the conductive block is realized.

However, in the welding process between the fixed end of the busbar 200 and the busbar 300, the busbar 200 is easily dislocated, so that the busbar 200 cannot be fixedly connected with the conductive block 400 through the connecting member, and the assembly defect rate of the busbar 200 is caused.

For improving the effect that female row and conducting block are connected, the battery module that this application embodiment provided has still included spacing subassembly 100, and this spacing subassembly 100 can be dismantled with the conducting block and be connected and counterpoint female link and conducting block to convenient female link and the conducting block fixed connection of arranging. The structure of the spacing assembly 100 will be described in detail below.

The spacing subassembly 100 that this application embodiment provided can include different structures, only need can be female the link of arranging with the conducting block counterpoint can.

Referring to fig. 1b and fig. 2 together, fig. 2 shows a schematic structural diagram of the position limiting assembly 100. The spacing assembly 100 provided by the embodiment of the present application may include a spacing housing 110 and a fastener 120. The limiting shell 110 is used for aligning the connecting end of the busbar with the conductive block, and the fastener 120 is used as a connecting piece to fixedly connect the busbar with the conductive block.

A containing cavity 115 is disposed in the limiting casing 110, and the containing cavity 115 is used for containing part of the conductive blocks and the output end of the busbar. And the side wall of the accommodating cavity 115 can be used as a limiting structure and is respectively abutted to the conductive block and the output end of the busbar, so that the connecting end of the busbar is aligned to the conductive block.

As an alternative, the limiting case 110 includes a plurality of sidewalls and a top plate 112 to form a receiving cavity 115 for receiving the connecting end of the busbar and the conductive block. The inner wall of the sidewall serves as a sidewall of the accommodating cavity 115, and abuts against the connecting end of the busbar and the conductive block to align the connecting end and the conductive block.

In a specific arrangement, the number of the side walls can be selected to be different. Such as two sidewalls or three sidewalls.

When the number of the sidewalls is two, the two sidewalls are named as the first sidewall 111 for convenience of description. The two first side walls 111 are oppositely disposed and connected to the top plate 112, so that the stopper housing 110 has an inverted U-shaped structure with an opening opened to the connecting end facing the busbar.

When the limiting assembly 100 is fixed to the conductive block, the first side wall 111 and the second side wall 113 are arranged at intervals along the X direction, so that the first side wall 111 and the second side wall 113 can limit and align the connecting end of the busbar and the conductive block in the X direction.

The inner walls of the two first side walls 111 serve as the side walls for accommodating the cavity 115, and are respectively abutted to the conductive block and the connecting end of the busbar when the limiting shell 110 is fixed on the conductive block, so that the connecting end of the busbar is aligned to the conductive block, namely, the through hole in the connecting end of the busbar is aligned to the threaded hole in the conductive block, and the connecting end of the busbar and the conductive block are fixedly connected by the fastening piece 120.

It should be understood that the first sidewall 111 of the limiting shell 110 should have a certain hardness to ensure that the first sidewall 111 is not bent in the Z direction, so as to ensure the alignment effect between the connecting end of the busbar and the conductive block.

A separate structure or an integrated structure may be employed between the two first sidewalls 111 and the top plate 112. When a split structure is adopted, the two first side walls 111 can be respectively connected with the top plate 112 in an adhesive manner or fixedly connected through a threaded connecting piece (a bolt or a screw); when the integrated structure is adopted, the limiting shell 110 can be injection molded through an injection molding mode.

When the limiting assembly 100 is used, the limiting assembly 100 is connected with the conductive block in a clamping manner, specifically, the limiting shell 110 is connected with the conductive block in a clamping manner. Thereby fixing the spacing housing 110 to the conductive block. When the above structure is adopted, the conductive block is provided with a first engaging member, and the sidewall of the accommodating cavity 115 is provided with a second engaging member 114 engaged with the first engaging member. At this time, the number of the second engaging members 114 is two, and the two second engaging members 114 are correspondingly disposed on the inner walls of the two first side walls 111. Similarly, the number of the first engaging members on the conductive block is also two, and the two first engaging members correspond to the two second engaging members 114.

When the above engagement method is adopted, the stopper housing 110 can be fixed to the conductive block by the engagement of the first engaging member and the second engaging member 114. For example, the first and second engaging members 114 may be engaging protrusions and engaging grooves; if the first engaging member is a slot, the second engaging member 114 is a protrusion; or the first engaging member is an engaging protrusion and the second engaging member 114 is a engaging groove. The snap connection between the limiting shell 110 and the conductive block can be achieved regardless of the manner in which the first and second snap members 114 are used as exemplified above.

When the second engaging members 114 are specifically arranged, the two second engaging members 114 are correspondingly arranged at one end of the two first sidewalls 111 away from the top plate 112. Thereby the one end of keeping away from roof 112 with two first lateral walls 111 passes through the mode of block and is connected two first lateral walls 111 with the conducting block, thereby can be fixed two first lateral walls 111, make the both ends of first lateral wall 111 can fix respectively (roof 112 is passed through to one end, the other end through the joint with the conducting block), improved the counterpoint effect to the connecting end of conducting block and female arranging.

During specific assembly, the limiting shell 110 can be vertically inserted downwards along the Z direction onto the conductive block and is fixed with the conductive block in a clamping manner. Or, the limiting shell 110 may be inserted in the opposite direction of the X direction, that is, the limiting shell 110 is inserted into the conductive block in the horizontal direction, and the connecting end of the busbar is aligned with the conductive block in the inserting process.

As an optional scheme, when the limiting casing 110 is inserted into the conductive block along the direction opposite to the X direction, the length direction of the second engaging member 114 is parallel to the X direction, and when the limiting casing 110 is not inserted into the conductive block, the second engaging member 114 is provided with a guide inclined surface 1141 toward one end of the conductive block, so that the second engaging member 114 can be conveniently inserted into the first engaging member, and the second engaging member 114 can be conveniently matched with the first engaging member.

With continued reference to fig. 2, the limiting assembly 100 provided in the embodiment of the present application may further include a fastener 120 for fixedly connecting the connecting end of the busbar with the conductive block. The fastening member 120 is inserted into the accommodating cavity 115 and fixedly connects the output ends of the conductive block and the busbar to each other, and the fastening member 120 is inserted into the limiting housing 110.

Referring also to fig. 3, fig. 3 shows an exploded view of the stop assembly 100. The fastening member 120 may be inserted into the receiving cavity 115 to fixedly connect the connecting end of the busbar to the conductive block through the top plate 112. Illustratively, the top plate 112 is provided with through holes 1121, and the through holes 1121 are used for passing the fasteners 120. When the through holes 1121 are specifically provided, the diameter of the through holes 1121 is larger than that of the fastening member 120, and the fastening member 120 and the through holes 1121 adopt a clearance fit. The through holes 1121 are provided only to facilitate the insertion of the fasteners 120. Alternatively, a notch may be formed in the top plate 112 or other avoiding manner may be adopted for the top plate 112, so that the fastening member 120 may be inserted into the accommodating cavity 115 to fix the connecting end of the busbar with the conductive block.

Taking the through hole 1121 as an example, when the through hole 1121 is provided, the position of the through hole 1121 corresponds to the position of the through hole 1121 on the connection end of the bus bar. Such that the fastener 120 can be inserted into the receiving cavity 115 through the top plate 112.

The fastener 120 may take on different configurations when the fastener 120 is specifically configured. Illustratively, the fastener 120 is a threaded connector, which may be a bolt, a screw, or a spring plunger, among other common threaded connectors. In the embodiment of the present application, the fastening member 120 employs a spring plunger, so that a good pressing force can be provided for the connecting end of the busbar and the conductive block, and the reliability of the electrical connection between the connecting end of the busbar and the conductive block is ensured.

When the side wall of the limiting case 110 is three, the limiting case 110 further includes a second side wall 113 connected to the two first side walls 111 and the top plate 112, respectively. At this time, the three side walls enclose a U-shaped structure facing the conductive block. The same side of the three side walls is fixedly connected with the top plate 112.

The second side wall 113 may fixedly connect two adjacent first side walls 111, so as to improve the stability of the two first side walls 111 in the Z direction. Thereby improving the reliability of the contraposition between the connecting end of the busbar and the conductive block.

When the limiting shell 110 is connected with the conductive block in a clamping manner, the length direction of the second clamping piece 114 is along the direction far away from the second side wall 113; and one end of the second engaging member 114 away from the second sidewall 113 is provided with a guiding inclined surface 1141 engaged with the first engaging member. Therefore, the matching of the limiting shell 110 and the connecting ends of the conductive blocks and the busbar is not affected by the arranged second side wall 113.

It can be seen from the above description that the battery module that this application embodiment provided aligns in advance female link and conducting block through the spacing subassembly 100 that sets up to conveniently arrange and the conducting block is connected, avoids female when welding with the busbar, leads to arranging the position dislocation, can't be connected with conducting block electrically conductively, has improved the yield of battery module assembly.

The embodiment of the application also provides a battery pack, and the battery pack comprises a box body and any one of the battery modules arranged in the box body.

In the technical scheme, the connecting end of the busbar and the conducting block are pre-aligned through the arranged limiting component 100, so that the busbar is conveniently connected with the conducting block, the busbar is prevented from being welded with the busbar, the position of the busbar is staggered, the busbar cannot be conductively connected with the conducting block, and the yield of battery module assembly is improved.

The embodiment of the application also provides an electric automobile which comprises an automobile chassis and any one of the battery module or the battery pack; wherein, the battery module or the battery pack is fixed on the automobile chassis. In the technical scheme, the connecting end of the busbar and the conducting block are pre-aligned through the arranged limiting component 100, so that the busbar is conveniently connected with the conducting block, the busbar is prevented from being welded with the busbar, the position of the busbar is staggered, the busbar cannot be conductively connected with the conducting block, and the yield of battery module assembly is improved.

In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on operational states of the present application, and are only used for convenience in describing and simplifying the present application, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In the description of the present application, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise explicitly stated or limited. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The present application has been described above with reference to preferred embodiments, but these embodiments are merely exemplary and merely illustrative. On the basis of the above, the present application can be subjected to various substitutions and improvements, and the substitutions and the improvements are all within the protection scope of the present application.

Claims

1. A battery module, comprising: the battery pack comprises a shell, a battery arranged in the shell and a bus bar connected with the battery;

2. The battery module according to claim 1, wherein the limiting assembly comprises a limiting shell and a fastener penetrating through the limiting shell; wherein,

the limiting shell is internally provided with an accommodating cavity for accommodating part of the conductive block and the output end of the busbar; the side wall of the accommodating cavity is respectively abutted against the conductive block and the output end of the busbar, and the connecting end is aligned to the conductive block;

the fastener is inserted into the accommodating cavity and fixedly connects the conductive block with the output end of the busbar.

3. The battery module according to claim 2, wherein the limiting component is connected with the conductive block in a clamping manner.

4. The battery module according to claim 3, wherein the conductive block is provided with a first engaging member; and a second clamping piece which is clamped and matched with the first clamping piece is arranged on the side wall of the accommodating cavity.

5. The battery module according to claim 4, wherein the restraining housing comprises a top plate and two oppositely disposed first side walls connected to the top plate, respectively;

the number of the second clamping pieces is two, and the two second clamping pieces are respectively arranged on the two first side walls in a one-to-one correspondence manner; the inner side walls of the two first side walls are side walls of the accommodating cavity;

the fastener is arranged on the top plate in a penetrating mode.

6. The battery module according to claim 5, wherein two second engaging members are disposed on one-to-one correspondence between the ends of the two first side walls far from the top plate.

7. The battery module according to claim 5, wherein the retaining case further comprises second side walls connected to the two first side walls and the top plate, respectively.

8. The battery module according to claim 7, wherein the second engaging member has a longitudinal direction in a direction away from the second side wall; and one end of the second clamping piece, which is far away from the second side wall, is provided with a guide inclined plane matched with the first clamping piece.

9. The battery module according to any one of claims 2 to 8, wherein the fastener is a spring plunger.

10. A battery pack, comprising a case and the battery module according to any one of claims 1 to 9 provided in the case.